VD4 CS/CS1
One breaker, full control, zero transient, CAPEX efficient solution for better power quality.
Indoor vacuum circuit breaker for capacitor banks
VD4-CS and VD4-CS1 are the solutions based on new vacuum interrupter technology and an innovative actuation system up to 38 kV, 1250 A, 31.5 kA and with noise-free performance, to support your business needs in reactive power compensation.
The VD4-CS family circuit breakers offer up to 20,000 overhaul-free operations and up to 10,000 back-to-back capacitor bank switching operations. These operations are performed with extremely low probability of re-strike and transients minimization in capacitor bank switching. Additionally, with VD4-CS1 real time power factor compensation and charged capacitor bank switching are allowed.
VD4 CS offers safe and reliable operations on discharged capacitor banks:
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VD4 CS1 offers safe, reliable and relentless operations on capacitor banks independently of their charge status. Additionally to the VD4 CS features, the VD4 CS1 offers:
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Product scope
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VD4 CS
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VD4 CS1
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Rated voltage
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up to 38 kV
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up to 38 kV
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Rated current
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up to 1,250 A
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up to 1,250 A
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Rated short circuit current
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up to 31.5 kA
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up to 31.5 kA
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Technology
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Vacuum
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Vacuum
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Operating mechanism
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Servomotors with synchronization
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Servomotors with synchronization
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Mechanical operations
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20,000 overhaul-free operations and up to 10,000 back-to-back capacitor bank switching operations
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20,000 overhaul-free operations and up to 10,000 back-to-back capacitor bank switching operations
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| Transient - free closing operations | Only on fully discharged capacitor banks | Anytime (independently by the charge of the capacitor bank) |
Monitoring & Diagnostic
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Yes
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No
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Standards
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IEC
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IEC
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Applications
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Utilities, Renewables, Energy demanding industries (green steel)
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Utilities, Renewables, Energy demanding industries (green steel), Power quality applications
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FREQUENTLY ASKED QUESTIONS
The VD4-CS is designed for capacitor banks, providing noise-free power quality through safe and reliable switching. It supports reactive power compensation needs with servomotor actuation and controlled switching.
The VD4-CS uses high accuracy in controlled switching technology to eliminate inrush currents. This feature helps in reducing the need for inrush limiting reactors and resistances, leading to significant cost and space savings.
The VD4-CS offers several benefits, including:
- Inrush Elimination: High accuracy in controlled switching technology.
- Cost and Space Savings: Eliminates the need for additional components.
- Reduced Maintenance Costs: Lowers the total cost of capacitor bank operation by eliminating downtime for breaker overhaul and extending lifespan with predictive health indication.
- Global Support: Fast and reliable support thanks to ABB’s global footprint.
The VD4-CS has the following specifications:
- Voltage: Up to 38 kV
- Current: Up to 1250 A
- Breaking Capacity: Up to 31.5 kA
- Operations: 20,000 overhaul-free and noise-free operations; 10,000 back-to-back capacitor bank switching operations
The VD4-CS reduces the total cost of capacitor bank operation by eliminating downtime for breaker overhaul and extending the lifespan of the breaker. It also saves up to 20% by using the same ratings and interfaces as existing medium voltage substations, thanks to its optimized footprint equivalent to standard distribution breakers.
The main difference between VD4-CS and VD4-CS1 is that VD4-CS can operate with inrush minimization only on fully discharged capacitor bank, so you have to wait at least 5 minutes before close a capacitor bank after you opened it; the VD4-CS1 can operate a capacitor bank with inrush minimization every time independently by the status of charge of the capacitor bank, it can perform closing or opening operations in sequence with a waiting time of 15s every 4 consecutive.
The VD4-CS1 high performance in capacitor bank switching is specifically designed for applications in which the power factor correction shall follow the active power generation or absorption profile continuously.
Typical applications are renewable power plants and energy consuming industry (as green steel plants), grid regulations are becoming more restrictive about the reactive power compensation absorption and the contribution to grid stability. The VD4-CS1 can be integrated with the actual solutions that use power electronics to have a more CAPEX efficient plant design.